嗯。其实我也不太明白合理的选择方式。 不过有些 library 设计者会写下他们的 Exception 管理策略 这是一个参考的方向，例如 AWS SDK http://aws.amazon.com/articles/Amazon-S3/3604 <% Exception Handling Understanding how and when the AWS SDK for Java throws exceptions is important in order to build high quality applications using the SDK. The following sections describe the different cases of exceptions that are thrown by the SDK and how to handle them appropriately. Why Unchecked Exceptions? The AWS Java SDK uses runtime (or unchecked) exceptions instead of checked exceptions for a few reasons: * To allow developers fine grained control over the errors they want to handle without forcing them to handle exceptional cases they aren't concerned about (and making their code overly verbose) * To prevent scalability issues inherent with checked exceptions in large applications In general, checked exceptions work well on small scales, but can become troublesome as applications grow and become more complex. For more information on the ongoing discussion in the Java community around the use of checked and unchecked exceptions, see the following references: http://www.artima.com/intv/handcuffs2.html http://www.mindview.net/Etc/Discussions/CheckedExceptions http://radio.weblogs.com/0122027/stories/2003/04/01/ JavasCheckedExceptionsWereAMistake.html %> --

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